Ahahahahahah ROFL surely never seen a buggy-juiced keyboard! Seems you are unlucky with computers..

Anyway I've never heard of this type of func..but googling I found this:

"func_viscluster is an internal brush entity available in all Orange Box games. It allows you to manually tell VVIS that the leaves inside its volume can all see each other. This is useful in large open areas where visibility calculations would otherwise take a very, very long time to complete. It should be textured with tools\toolstrigger. "

Basically doesn't work with CSS. It's not a Orange Box game.

Vvis takes lot of time when it falls into some critical areas, for example when there are two or more leaves that are so close each other (tipically less than half hammer unit).
Try to find those areas and keep in mind that if there is something wrong you can find it in the compile report.
Any way my dropbox seems always fucked up..try to e-mail me the bsp or vmf and the compile log. I can help you also with this trouble.
Have a nice day

I wanted to. :D

Every thing is copacetic how bout with you my northern brother?

Sure, I should be able to point some things out. Only problem is that I'm on my old PC atm because my normal PC keeps overheating XD Need to get a new fan.